Storage tank

Storage tank means a stationary unit that is constructed primarily of nonearthen materials (such as wood, concrete, steel, or reinforced plastic) that provide structural support and is designed to hold a bulk quantity of liquid. Storage tanks do not include:
(1) Units permanently attached to conveyances such as trucks, trailers, rail cars, barges, or ships;
(2) Pressure vessels designed to operate in excess of 204.9 kilopascals and without emissions to the atmosphere;
(3) Bottoms receivers;
(4) Surge control vessels;
(5) Vessels storing wastewater; or
(6) Reactor vessels associated with a manufacturing process unit.

Source

40 CFR § 63.2406


Scoping language

Terms used in this subpart are defined in the CAA, in 63.2, 40 CFR part 63, subparts H, PP, SS, TT, UU, and WW, and in this section. If the same term is defined in another subpart and in this section, it will have the meaning given in this section for purposes of this subpart. Notwithstanding the introductory language in 63.921, the terms container and safety device shall have the meaning found in this subpart and not in 63.921.

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